Polyester film with low-temperature resistance and high flexibility and preparation method of polyester film

A polyester film, high toughness technology, applied in the field of polyester film, can solve the problems affecting the scope of use and safety, insufficient toughness of polyester film, easy to become brittle, etc., to save costs and resources, cost-effective, low temperature good mechanical properties

Inactive Publication Date: 2018-06-22
SUZHOU WILLOCK ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the application process, especially at low temperatures, the polyester film has insufficient toughness, tends to become brittle or even burst, which affects its range of use and safety.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention provides a low-temperature-resistant high-toughness polyester film, the composition of which is as follows (percentage by weight):

[0022] Polyethylene terephthalate accounts for 75%, glass fiber accounts for 4%, antioxidant accounts for 1076 3%, toughening agent (ethylene-vinyl acetate copolymer) accounts for 2%, water-soluble acrylate-styrene-acrylic acid copolymer Items accounted for 16%.

[0023] The polyester film is prepared according to the following method: weigh the raw materials and mix them evenly, heat and dry; after drying, extrude through the melt extrusion equipment, cool, and the cooling rate is controlled at 65°C / min; after cooling, carry out longitudinal stretching, stretching The stretching temperature is 95°C; the stretching temperature is 130°C for transverse stretching, and finally the polyester film is shaped. The thickness of the polyester film was 120 μm.

[0024] Among them, the glass transition temperature (Tg) of the water-so...

Embodiment 2

[0026] The invention provides a low-temperature-resistant high-toughness polyester film, the composition of which is as follows (percentage by weight):

[0027] Polyethylene terephthalate accounts for 67%, glass fiber accounts for 3%, antioxidant accounts for 1076 2%, antioxidant accounts for 168 2%, toughening agent (ethylene-vinyl acetate copolymer) accounts for 1%, water-soluble acrylic acid Ester-styrene-acrylic acid copolymer accounts for 25%.

[0028] The polyester film is prepared according to the following method: weigh the raw materials and mix them evenly, heat and dry; after drying, extrude through the melt extrusion equipment, cool, and the cooling rate is controlled at 70°C / min; after cooling, carry out longitudinal stretching, stretching Stretching temperature is 95°C; transverse stretching, stretching temperature is 130°C, and finally shaped to obtain a polyester film, the thickness of the polyester film is 100 μm.

[0029] Among them, the glass transition temp...

Embodiment 3

[0031] The invention provides a low-temperature-resistant high-toughness polyester film, the composition of which is as follows (percentage by weight):

[0032] Polyethylene terephthalate accounts for 70%, glass fiber accounts for 5%, antioxidant accounts for 1010 2%, toughening agent (ethylene-vinyl acetate copolymer) accounts for 3%, water-soluble acrylate-styrene-acrylic acid copolymer Things accounted for 20%.

[0033] The polyester film is prepared according to the following method: weigh the raw materials and mix them evenly, heat and dry; after drying, extrude through the melt extrusion equipment, cool, and the cooling rate is controlled at 55°C / min; after cooling, carry out longitudinal stretching, stretching The stretching temperature is 85°C; the stretching temperature is 120°C for transverse stretching, and the polyester film is finally shaped. The thickness of the polyester film was 109 μm.

[0034]Among them, the glass transition temperature (Tg) of the water-so...

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Abstract

The invention relates to a polyester film with low-temperature resistance and high flexibility. The polyester film is characterized by being prepared from components in percentage by weight as follows: 67%-75% of polyethylene terephthalate, 3%-5% of glass fibers, 2%-4% of an antioxidant, 1%-3% of a flexibilizer and 16%-25% of a water-soluble acrylate-styrene-acrylic copolymer, wherein the water-soluble acrylate-styrene-acrylic copolymer is prepared from methyl acrylate, 2-ethylhexyl acrylate, butyl acrylate, styrene and acrylic acid by polymerization. By adding part of the water-soluble acrylate-styrene-acrylic copolymer with glass transition temperature being subzero 44 DEG C-subzero 23 DEG C as well as good ductility and flexibility, the flexibility of the polyester film, especially themechanical properties at low temperature are improved, and the application range of the polyester film is expanded. Meanwhile, the water-soluble acrylate-styrene-acrylic copolymer is lower in cost, the adding process is simple, non-toxic and environmentally friendly, and cost saving and resource saving are facilitated.

Description

technical field [0001] The invention relates to the field of polyester films, in particular to a polyester film with low temperature resistance and high toughness and a preparation method thereof. Background technique [0002] Polyester film (PET), with polyethylene terephthalate as the main raw material, is a film material with comprehensive properties. It has good transparency, low haze, high gloss; good air tightness and fragrance retention; moderate moisture resistance. Compared with ordinary films, polyester films have better mechanical properties, better tensile strength and impact strength. Polyester film also has excellent electrical insulation properties, weather resistance, weak acid resistance and oil resistance, and it also has the advantages of non-toxicity, good stability against chemicals, and low water absorption. Polyester film is used as various food, medicine, non-toxic and sterile packaging materials because of its many advantages; high-grade packaging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L33/08C08L23/08C08K7/14C08K5/134C08K5/526C08J5/18C08F220/18C08F220/14C08F212/08C08F220/06
CPCC08F220/18C08F220/1804C08J5/18C08J2367/02C08J2423/08C08J2433/08C08K5/1345C08K5/526C08K7/14C08F220/14C08F220/1806C08F212/08C08F220/06
Inventor 何建锋
Owner SUZHOU WILLOCK ELECTRONICS TECH CO LTD
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